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Commit 9f2c8a03 authored by Marcel Holtmann's avatar Marcel Holtmann
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Bluetooth: Replace RFCOMM link mode with security level 

Change the RFCOMM internals to use the new security levels and remove
the link mode details.
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 2af6b9d5
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Showing with 79 additions and 31 deletions
include/net/bluetooth/rfcomm.h
View file @ 9f2c8a03
......@@ -183,8 +183,8 @@ struct rfcomm_dlc {
u8 remote_v24_sig;
u8 mscex;
u8 out;
u32 link_mode;
u8 sec_level;
u8 role_switch;
u32 defer_setup;
uint mtu;
......@@ -307,7 +307,8 @@ struct rfcomm_pinfo {
struct bt_sock bt;
struct rfcomm_dlc *dlc;
u8 channel;
u32 link_mode;
u8 sec_level;
u8 role_switch;
};
int rfcomm_init_sockets(void);
......
net/bluetooth/rfcomm/core.c
View file @ 9f2c8a03
......@@ -223,21 +223,11 @@ static int rfcomm_l2sock_create(struct socket **sock)
return err;
}
static inline int rfcomm_check_link_mode(struct rfcomm_dlc *d)
static inline int rfcomm_check_security(struct rfcomm_dlc *d)
{
struct sock *sk = d->session->sock->sk;
struct l2cap_conn *conn = l2cap_pi(sk)->conn;
if (d->link_mode & RFCOMM_LM_SECURE)
return hci_conn_security(conn->hcon, BT_SECURITY_HIGH);
if (d->link_mode & RFCOMM_LM_ENCRYPT)
return hci_conn_security(conn->hcon, BT_SECURITY_MEDIUM);
if (d->link_mode & RFCOMM_LM_AUTH)
return hci_conn_security(conn->hcon, BT_SECURITY_LOW);
return 1;
return hci_conn_security(l2cap_pi(sk)->conn->hcon, d->sec_level);
}
/* ---- RFCOMM DLCs ---- */
......@@ -390,7 +380,7 @@ static int __rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst,
d->cfc = (s->cfc == RFCOMM_CFC_UNKNOWN) ? 0 : s->cfc;
if (s->state == BT_CONNECTED) {
if (rfcomm_check_link_mode(d))
if (rfcomm_check_security(d))
rfcomm_send_pn(s, 1, d);
else
set_bit(RFCOMM_AUTH_PENDING, &d->flags);
......@@ -1192,7 +1182,7 @@ void rfcomm_dlc_accept(struct rfcomm_dlc *d)
d->state_change(d, 0);
rfcomm_dlc_unlock(d);
if (d->link_mode & RFCOMM_LM_MASTER)
if (d->role_switch)
hci_conn_switch_role(l2cap_pi(sk)->conn->hcon, 0x00);
rfcomm_send_msc(d->session, 1, d->dlci, d->v24_sig);
......@@ -1200,7 +1190,7 @@ void rfcomm_dlc_accept(struct rfcomm_dlc *d)
static void rfcomm_check_accept(struct rfcomm_dlc *d)
{
if (rfcomm_check_link_mode(d)) {
if (rfcomm_check_security(d)) {
if (d->defer_setup) {
set_bit(RFCOMM_DEFER_SETUP, &d->flags);
rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT);
......@@ -1660,7 +1650,7 @@ static void rfcomm_process_connect(struct rfcomm_session *s)
d = list_entry(p, struct rfcomm_dlc, list);
if (d->state == BT_CONFIG) {
d->mtu = s->mtu;
if (rfcomm_check_link_mode(d)) {
if (rfcomm_check_security(d)) {
rfcomm_send_pn(s, 1, d);
} else {
set_bit(RFCOMM_AUTH_PENDING, &d->flags);
......@@ -1748,10 +1738,6 @@ static inline void rfcomm_process_dlcs(struct rfcomm_session *s)
} else
rfcomm_dlc_accept(d);
}
if (d->link_mode & RFCOMM_LM_SECURE) {
struct sock *sk = s->sock->sk;
hci_conn_change_link_key(l2cap_pi(sk)->conn->hcon);
}
continue;
} else if (test_and_clear_bit(RFCOMM_AUTH_REJECT, &d->flags)) {
rfcomm_dlc_clear_timer(d);
......@@ -1994,7 +1980,7 @@ static void rfcomm_security_cfm(struct hci_conn *conn, u8 status, u8 encrypt)
d = list_entry(p, struct rfcomm_dlc, list);
if (!status && encrypt == 0x00 &&
(d->link_mode & RFCOMM_LM_ENCRYPT) &&
d->sec_level == BT_SECURITY_HIGH &&
(d->state == BT_CONNECTED ||
d->state == BT_CONFIG)) {
__rfcomm_dlc_close(d, ECONNREFUSED);
......
net/bluetooth/rfcomm/sock.c
View file @ 9f2c8a03
......@@ -261,14 +261,19 @@ static void rfcomm_sock_init(struct sock *sk, struct sock *parent)
if (parent) {
sk->sk_type = parent->sk_type;
pi->link_mode = rfcomm_pi(parent)->link_mode;
pi->dlc->defer_setup = bt_sk(parent)->defer_setup;
pi->sec_level = rfcomm_pi(parent)->sec_level;
pi->role_switch = rfcomm_pi(parent)->role_switch;
} else {
pi->link_mode = 0;
pi->dlc->defer_setup = 0;
pi->sec_level = BT_SECURITY_LOW;
pi->role_switch = 0;
}
pi->dlc->link_mode = pi->link_mode;
pi->dlc->sec_level = pi->sec_level;
pi->dlc->role_switch = pi->role_switch;
}
static struct proto rfcomm_proto = {
......@@ -408,7 +413,8 @@ static int rfcomm_sock_connect(struct socket *sock, struct sockaddr *addr, int a
bacpy(&bt_sk(sk)->dst, &sa->rc_bdaddr);
rfcomm_pi(sk)->channel = sa->rc_channel;
d->link_mode = rfcomm_pi(sk)->link_mode;
d->sec_level = rfcomm_pi(sk)->sec_level;
d->role_switch = rfcomm_pi(sk)->role_switch;
err = rfcomm_dlc_open(d, &bt_sk(sk)->src, &sa->rc_bdaddr, sa->rc_channel);
if (!err)
......@@ -741,7 +747,14 @@ static int rfcomm_sock_setsockopt_old(struct socket *sock, int optname, char __u
break;
}
rfcomm_pi(sk)->link_mode = opt;
if (opt & RFCOMM_LM_AUTH)
rfcomm_pi(sk)->sec_level = BT_SECURITY_LOW;
if (opt & RFCOMM_LM_ENCRYPT)
rfcomm_pi(sk)->sec_level = BT_SECURITY_MEDIUM;
if (opt & RFCOMM_LM_SECURE)
rfcomm_pi(sk)->sec_level = BT_SECURITY_HIGH;
rfcomm_pi(sk)->role_switch = (opt & RFCOMM_LM_MASTER);
break;
default:
......@@ -756,7 +769,8 @@ static int rfcomm_sock_setsockopt_old(struct socket *sock, int optname, char __u
static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen)
{
struct sock *sk = sock->sk;
int err = 0;
struct bt_security sec;
int len, err = 0;
u32 opt;
BT_DBG("sk %p", sk);
......@@ -767,6 +781,23 @@ static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname, c
lock_sock(sk);
switch (optname) {
case BT_SECURITY:
sec.level = BT_SECURITY_LOW;
len = min_t(unsigned int, sizeof(sec), optlen);
if (copy_from_user((char *) &sec, optval, len)) {
err = -EFAULT;
break;
}
if (sec.level > BT_SECURITY_HIGH) {
err = -EINVAL;
break;
}
rfcomm_pi(sk)->sec_level = sec.level;
break;
case BT_DEFER_SETUP:
if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
err = -EINVAL;
......@@ -796,6 +827,7 @@ static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __u
struct sock *l2cap_sk;
struct rfcomm_conninfo cinfo;
int len, err = 0;
u32 opt;
BT_DBG("sk %p", sk);
......@@ -806,7 +838,26 @@ static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __u
switch (optname) {
case RFCOMM_LM:
if (put_user(rfcomm_pi(sk)->link_mode, (u32 __user *) optval))
switch (rfcomm_pi(sk)->sec_level) {
case BT_SECURITY_LOW:
opt = RFCOMM_LM_AUTH;
break;
case BT_SECURITY_MEDIUM:
opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT;
break;
case BT_SECURITY_HIGH:
opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT |
RFCOMM_LM_SECURE;
break;
default:
opt = 0;
break;
}
if (rfcomm_pi(sk)->role_switch)
opt |= RFCOMM_LM_MASTER;
if (put_user(opt, (u32 __user *) optval))
err = -EFAULT;
break;
......@@ -840,6 +891,7 @@ static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __u
static int rfcomm_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
{
struct sock *sk = sock->sk;
struct bt_security sec;
int len, err = 0;
BT_DBG("sk %p", sk);
......@@ -853,6 +905,15 @@ static int rfcomm_sock_getsockopt(struct socket *sock, int level, int optname, c
lock_sock(sk);
switch (optname) {
case BT_SECURITY:
sec.level = rfcomm_pi(sk)->sec_level;
len = min_t(unsigned int, len, sizeof(sec));
if (copy_to_user(optval, (char *) &sec, len))
err = -EFAULT;
break;
case BT_DEFER_SETUP:
if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
err = -EINVAL;
......
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